The book · read it here, free

The Hundred-Year Chair

Designing Atoms in the Age of Bits

by Karl T. Ulrich

Twenty-one chapters in four acts, with a preface and a colophon. Every chapter is a link; this is the whole draft, in order, and it stays more current than any printed copy. The technical notes and interactive tools live under the relevant chapters and on the notes and home pages.

These are working drafts, refined in public. The words here and in the book are the same; the site just keeps the weeds, the sources, and the tools that paper leaves out.

Preface: Don’t Buy This Book · Everything here is free, and more; why the print edition exists anyway.

Act I

Why a chair, and why me

  1. 1Prologue: The Stranger’s ChairThe gap, the urge, and the wager: a chair a stranger can keep rebuilding after everything that made it is gone.
  2. 2Barbaric YawpThe motive question, leveled at myself: is a hundred-year chair vanity or a barbaric yawp, and the lab-report contract for everything that follows.
  3. 3Ten Thousand Years of SittingWhy we sit in chairs at all, from my own losing contest with the resting squat to the chair that grew on a tree.
  4. 4Why Every Designer Does a ChairWhy the chair is the designer's proof of standing, and ten chairs sorted by where the design lives: Thonet, Rietveld, Panton, Judd, Starck, Eek, Boyd.
  5. 5The Chair I Met in ParisHow a project reaches critical mass. An afternoon in the Bon Marché in May 2019, seven years of not acting on it, a pile of narrow offcuts that became somebody’s problem, a month in Queensland fourteen time zones from anyone with a claim on the mornings, and a Friday lunchtime with no explanation on the record.

Act II

The search and the chair

  1. 6The SearchNine days, four chairs, and a brief that spent the design’s freedom before a line was drawn. A precedent list arrives in two minutes and teaches nothing until there is a chair to stand beside it; then Rietveld’s 1934 crate chair, the error in his own sheet that you can only find with a saw, a text from a son, a chair at one tenth scale, and a full-size chair ported off a photograph.
  2. 7The Verdict of the BuildsWendy sits down and the chair moves. Seven chairs, seven verdicts, Mr. Grove’s triangles, and the finding of the whole act: only three things ever moved the design.
  3. 8First Principles: Two TrianglesStarting over from structure: racking, why the answer is a triangle, seven architectures in an hour and fifty-one minutes, the four numbers with their rounding confessed, and the audit four days later by a machine that grew a chair and did not grow this one.
  4. 9Nailed It: The KeelThe ledger-board morning: one member that touches everything, carries every hard joint, and is the datum the whole chair is built from. The summit that held.

Act III

Making it last

  1. 10Lovable, Legible, MaintainableThe thesis, stated plainly, what a chair that lasts is worth in ecopoints, and why standardization is not a longevity mechanism.
  2. 11The PatternGenotype and phenotype: three words and four numbers that have not moved since August, a chair that has changed five times in a day, and why the appendix will disagree with the website.
  3. 12ChaironomicsThe product archaeologist tears down his own category: the coffee-maker dig, the Köl brief at $23 FOB, the Eames markup, and the fourth game, a chair priced in Saturdays.
  4. 13Worth Its FootprintThe eco-indicator instrument: the ecopoint, the flight worth 250,000 cups, and a wood-versus-plastic dead heat that only service life breaks open.
  5. 14How Long Is a Hundred Years?Longevity as a custody and desirability problem, and the orange chair on the verge.
  6. 15Aesthetics, Style, MemphisHow the chair arrived at a Memphis-adjacent look from function, not style.
  7. 16Signing Work You Will Not OutliveA rotational ambigram of my own name, a branding career turned against itself, and the three signatures a lasting object collects: maker, restorer, custodian.

Act IV

Doing the work

  1. 17The CentaurTwo ways to use a machine on a structure, and only one of them worked: the error ledger of a human and a machine auditing each other, what the thinking cost, and a sentence retracted in public.
  2. 18Before BreakfastThe tape has a chronotype: 1,057 timestamped turns, four inventions before eight in the morning, one spectacular evening, and the case for protecting your best ninety minutes.
  3. 19So Similar, Yet So DifferentA second chair in four days, from the scrap pile: the same two triangles with the apex moved to the arm, the fold, the story pole, and what a designer does with a better idea.
  4. 20A Thousand-Year Chair?The discipline pushed to its limit: Ise, Westminster, and the clock in the mountain.
  5. 21Coda: The Keel of TheseusIdentity through the replacement of every part, and whether the scrap problem was ever solved.

About the Designer · Colophon · The colophon is readable now: the stack, who wrote what, the voice problem with a specimen, the humanizing, and one unresolved question.

Appendix: The Pattern · The build itself: the Krat precedent and the complete K2-Keel pattern, from the four numbers and the cut list to the conformance test.

The Hundred-Year Chair · hundredyearchair.com · drafted and refined in public, August 2026. Every figure on this site is generated from the same scripts that cut the chair; where a value is estimated rather than measured, it says so. home · the technical notes